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Publication of SU378013A1publicationCriticalpatent/SU378013A1/ru
Priority claimed from DE19691918071external-prioritypatent/DE1918071A1/de
Application filedfiledCritical
Priority claimed from SU1426047Aexternal-prioritypatent/SU383300A3/ru
Application grantedgrantedCritical
Publication of SU378013A3publicationCriticalpatent/SU378013A3/ru